GERAUS. 281 
d. Prosternum armed with two short, stout, upwardly-curved spines, and with a circular cavity between 
them ; first ventral segment broadly depressed down the middle. 
Length 43-53, breadth 23-24 millim. (¢ 2.) 
Hab. Mexico, Xucumanatlan in Guerrero, 7000 feet (H. H. Smith). 
Two males and one female, all somewhat abraded. Larger and broader than 
G. pugnax, the prothorax broader and more rounded at the sides, the rostrum a little 
shorter and stouter, the puncturing of the upper and under surfaces not so coarse, that 
of the elytral interstices less asperate, the vestiture coarser beneath and finer above, 
the tibie more feebly unguiculate in the male. G. striatirostris, Lec., from Texas, is 
also a nearly allied form. 
41. Gerzeus coarctatus, sp.n. (Tab. XV. fig. 14, ¢.) 
Oblong-ovate, rather broad, black, the tarsi paler; somewhat thickly clothed with short, fine, hair-like, 
cinereous scales, the scales on the prothorax longer and transversely arranged, and those on the elytra 
placed in from 2-4 rows down each interstice ; the vestiture of the under surface coarser and also cinereous. 
Head finely punctate, transversely grooved between the eyes; rostrum stout, strongly arcuate, slightly 
longer than the head and prothorax, very sparsely, finely punctate, the punctures becoming coarser and 
more crowded at the sides towards the base, the antenne inserted at about the middle, the antennal club 
short-ovate, stout. Prothorax broad, transverse, rounded at the sides, and strongly constricted in front; 
densely, finely, confluently punctate, except along the narrow smooth median face, the short tubulate 
anterior lobe coarsely and rugosely punctured. LElytra rather long, gradually narrowing from the base ; 
shallowly and narrowly punctate-striate, the interstices broad, flat, and densely punctate. Beneath 
densely punctate. Prosternum depressed down the middle anteriorly, the transverse subapical sulcus 
deep. Legs rather short, the femora stout, clavate, the tibie strongly unguiculate. 
Length 52, breadth 25 millim. (@.) 
Hab. Mexico (Truqui, in Mus. Brit.). 
Two females. Closely related to G. amplicoliis, and with the prothorax very similarly 
shaped; but with the rostrum less thickened at the base, the elytra more oblong and 
unimpressed, with the. strie conspicuously punctate, the prothorax more densely 
and not so coarsely punctate (except along the smooth median line), its anterior lobe 
subfoveolate, the vestiture fine and uniformly distributed. ‘The prosternum is probably 
spined in the male. 
42. Gerzeus duplaris, sp. n. 
Oblong-rhomboidal, black ; somewhat thickly clothed with short, narrow, setiform, whitish scales, which are 
arranged in a double series along each elytral interstice, the vestiture of the prothorax finer, hair-like, 
and transversely arranged, that of the under surface rather coarse. Head finely punctate, transversely 
grooved between the eyes ; rostrum a little longer than the head and prothorax, abruptly curved down- 
ward from near the base, the basal portion thickened and rugosely punctate, the apical portion flattened 
and almost smooth, the antennz inserted far behind the middle, the antennal club ovate. Prothorax 
proader than long, narrowing from the base, slightly rounded at the sides anteriorly, constricted in front; 
densely, finely, confluently punctate, the narrow interspaces raised into sinuous longitudinal ridges, the 
disc with an incomplete raised median line. Elytra moderately long, gradually narrowed from the base, 
punctate-striate, the interstices closely asperato-punctate. Beneath closely punctate. Prosternum rather 
proadly sulcate down the middle anteriorly, Anterior coxe narrowly separated. 
Length 42-44, breadth 24 millim,. (2.) . 
BIOL. CENTR.-AMER., Coleopt., Vol. IV. Pt. 5, Way 1908. 200 
